Xi 
It 
THE HUMBLE-BEE 
. Vertical section through a domicile in Sladen’s humble- 
bee house 
. The sections or storeys shown separately 
. Comb of 2. zerrestris from Sladen’s humble-bee house 
. Section of Sladen’s original device to attract underground- 
nesting humble-bees 
Sladen’s domicile for humble-bees, with Sladen’s wooden 
cover 
. Vertical section of Sladen’s tin domicile . 
External anatomy of B. ruderatus . : 
Hind metatarsus of B. zerrestris (male), B. ducorum (male), 
B. soroénsis (male), and 4. pratorum (male) 
Queen of B. /atrezllel/us incubating her immense lump of 
brood 
Diagram of cocoons in a commencing nest of B. der- 
hamellus ‘ , : 5 
Hind-leg of Bombus and Psithyrus female 
. Tip of abdomen (under-side) of the queens of each of the 
British species of Pszthyrus, showing the elevations on 
the 6th ventral segment . 
. Antenne of Ps. vestalis 6 and Ps. distinctus 3 
. Device for excluding ants from humble-bee’s nest 
. How to hold a humble-bee 
. Loads of pollen collected by Bomdz 
PLATES 
. Bombus terrestris—queen, worker, and male. To face p. 
lucorum “ - 
lapidarius 5 - 
” 
” 
. SOYOENSIS 5 - 
Bombus pratorum—queen, worker, and male. To face p. 
lapponicus “ - 
Jonellus 3 Pp 
cullumanus—male (slightly faded ). 
ruderatus—two dark males, three dark queens. 
” 
” 
” 
” 
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